[asterisk-users] Odd bug in Siemens C460IP ?

[Robert Lister]

Hello,

I think I have encountered an odd bug in Siemens C460 IP/dect handsets, 
which is a bit annoying, and I'm not (yet) sure how to get round it without 
lots of hacks.

Basically, on all external incoming calls, we set:

exten => s,n,SIPAddHeader(Alert-Info: Bellcore-dr2)

This causes handsets (i.e. Cisco 7960 / Grandstream / aastra) to set a 
different ring cadence so to differentiate between external and internal 
calls.

Other handsets that do not support Alert-Info: just ignore the presence 
of this header.

When this header is set in a call to the C460 IP, it does not alert, in fact 
it does not respond to any INVITE requests; asterisk just retries the 
requests a few times and then gives up.

Anyone able to reproduce?  I have firmware version 010700000000 / 041.00

I suppose as a workaround I could add an astDB entry for these extensions, 
and a bit of logic in the dialplan to tell asterisk not to add the header 
for extensions that have that flag set.


Regards,



Rob


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Robert Lister     - London Internet Exchange - http://www.linx.net/
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